HD 210702 b

HD 210702 b is an exoplanet located approximately 177 light-years away^[3] in the constellation of Pegasus, orbiting the star HD 210702. This planet, together with HD 175541 b and HD 192699 b, are planets around intermediate mass stars that were announced in April 2007 by Johnson et al. It has at least twice the mass of Jupiter and it orbits with semimajor axis of 1.17 AU, corresponding to a period of 341.1 days.^[1]

HD 210702 b

Discovery[1]
Discovered by	Johnson et al.
Discovery site	Lick Observatory and Keck Observatory
Discovery date	2007
Detection method	Doppler spectroscopy
Orbital characteristics[2]
Semi-major axis	1.148±0.057 AU
Eccentricity	0.028±0.034
Orbital period (sidereal)	354.10±0.70 d
Time of perihelion	2454042±64 JD
Argument of perihelion	189±66 º
Semi-amplitude	37.8±2.0 m/s
Star	HD 210702
Physical characteristics[2]
Mass	≥1.808±0.097 MJ

Planets around intermediate mass subgiants provide clues for the history of formation and migration of planets around A-type stars.

See also

• HD 175541 b
• HD 192699 b